coherence length


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coherence length

[kō′hir·əns ‚leŋkth]
(physics)
For a beam of particles, the typical length of a wave packet along the beam; the more monochromatic the beam, the greater its coherence length.
(solid-state physics)
A measure of the distance through which the effect of any local disturbance is spread out in a superconducting material. Also known as coherence distance.
References in periodicals archive ?
Ultrafast laser properties such as short duration, broad spectral bandwidth and short coherence length support the growth of the market when compared to other narrow medium lasers.
The coherence length of each of these lasers is approximately a few centimeters.
Thanks to this device we will quantify the spin coherence length of OSC and we shall be able to control spin transport either by external (magnetic or electric field) or internal (crystallographic) effects.
Interference fringes occur with backreflected light under the condition that both path lengths match to within the coherence length of the light.
1-3) When the optical path length of light backscattered from the sample and light reflected from the reference mirror are within the coherence length of the light source, constructive interference occurs, and a signal is generated.
which corresponds to the (001) diffraction, is estimated from the Scherrer relation to have a very high coherence length of 168 A (18, 22).
The coherence length of this diffraction is only 37 A, which is slightly larger than the length of just one repeat unit in the backbone.
If the coherence length is very small, that essentially means you have a weak link at this point,' says Praveen Chaudhari of the IBM Thomas J.
There is even controversy over the applicable characteristic length scale: whether it is the so-called Bardeen-Cooper-Schrieffer (BCS) coherence length, or a much smaller length that is inversely proportional to the Fermi energy of the system.
The high power laser portfolio from New Focus offers narrow linewidth and long coherence length, which are crucial for industrial spectroscopic applications such as quality control, chemical analysis, and security.
The high power SWL-7513-H laser is designed to target process Raman spectroscopy and interferometric metrology, where high power, narrow linewidth and long coherence length are crucial, and can address industrial applications such as quality control, chemical analysis, and security.
The laser system offers industry-leading narrow linewidths for precision Raman experiments and long coherence lengths for high-dynamic range surface profile measurements in interferometry applications.